In search of 3PP tech.

[Arutema]

Currently GMing Iron Gods, nearing end of book 1.

Need a way to give a certain Technic League agent and possibly a hired goon or two the ability to breathe water. Potions of water breathing being kinda boring and not fitting the adventure's themes.

Not finding what I need in Technology Guide without a load of other environmental protections making the item/armor too expensive to give out as low level loot.

So has a 3PP published tech that's basically scuba gear or wetsuit + scuba gear?

[doc chaos]

You can try Technology Unleashed from Otherverse Games. There are some first party books that have something you're looking for. Have you tried Starfinder?

[doc chaos]

https://aonprd.com/EquipmentMiscDisplay.aspx?ItemName=Artifical%20gills

[TxSam88]

IIRC correctly Carrion Crown book 5 or 6 has a underwater breathing helmet.

Or just look a d20 Modern, I'm sure it has something

[ShadowcatX]

Akashic Powers, either in that book or in the sci-fi setting Arc Forge has rules for Akashic Powers as cyberware. Not sure if there's a water breathing power but maybe, and even if there isn't you could make one.

[Here4daFreeSwag]

Alluria Publishing's Cerulean Seas Campaign setting is chocked full of underwater stuff; with a bit of some GM handwavin', even the available magical items there could be 'translated' into a more technological format. ;)